113results about How to "Achieve self-protection" patented technology

A miniature hydrogen cell stack control system is composed of a display module, an air pressure acquisition module, a voltage acquisition module, a current acquisition module, a temperature acquisition module, a liquid level acquisition module, an alarm module and an exception handling module. Data acquired by an air pressure sensor, a temperature sensor, a level sensor and a voltage sensor can be displayed at real time through a display panel. When there is an abnormal condition, the system can realize automatic protection of the electrical stack through flickering of a display panel light and alarm of a buzzer and through methods of closing loads and the like. According to the data acquired by the temperature sensor, the system adjusts revolving speed of a fan so as to make the electrical stack operate in the optimum state. Through calculating and comparing data acquired by the sensors, the control system controls related motions of an air inlet solenoid valve and an air outlet solenoid valve so as to realize automatic control of an air passage. The system can be adopted to automatically realize activation of the electrical stack, and operators can voluntarily select whether to need the activation function.

The invention provides an outdoor display device of ideologies and politics. The device comprises a base, a groove formed in the base, a display mechanism arranged in the groove, a retracting mechanism arranged between the display mechanism and the groove for lifting the displaying mechanism in the groove, and a water drainage mechanism arranged at the periphery wall of the groove. According to the outdoor display device of ideologies and politics, the lifting mode is used for administering self-protection measures during the occurrence of severe convection weather to retract the device into the groove to lower the height. At the same time, a sealed display structure is used for preventing the phenomenon that stagnant water enters the display mechanism, and combined with the inclined ring groove and the ring water seal, the display mechanism can not only retract freely in the groove, but also achieve the automatic water drainage. An emergency protection mechanism is used for implementing further self-protection during the occurrence of severe convection weather to guarantee that the device can achieve intelligent and automatic control after being inducted for once, the personnel maintenance is reduced, and reconstruction investment for the damages caused by the severe convection weather can be lowered.

Provided is a magnetic driving mechanism which comprises an armature, a coil, and an iron core. The armature comprises a fixed portion and a vibration transduction portion. The coil and the iron core are successively sleeved on the vibration transduction portion. The top side and the bottom side of the vibration transduction portion are equipped with permanent magnets fixedly connected with the inner surface of the iron core. The coil and the iron core are bonded so as to form a bonded surface. The inner cavity of the coil close to the bonded surface is extended towards the vibration transduction portion to form a protruded portion. The distance between the protruded portion and the vibration transduction portion is less than the distance between the permanent magnet and the vibration transduction portion. The magnetic driving mechanism suitable for a receiver employs the coil provided with the protruded portion and may prevent the receiver from being attracted by the permanent magnets when the receiver is subjected to impact or the armature has overlarge vibration amplitude, wherein the receiver being attracted by the permanent magnets may result in the failure of the receiver. The invention also relates to a receiver containing the above magnetic driving mechanism.

The invention discloses a spontaneous-combustion type fire extinguishing bullet for firefighting and further discloses a launching device of the fire extinguishing bullet. The spontaneous-combustion type fire extinguishing bullet comprises an opening sealing cover, an external container and an internal container; and threads are arranged on the inner walls of both the inner circle and the outer circle of the opening sealing cover correspondingly, a puncturing sharp knife is arranged at the top end in a second external container body, and the upper side wall of a first sealing ring is fixed tothe outer wall of the internal container through plastic screws. The launching device comprises a launching cavity, a material putting chamber, a first spring, a first material channel and a second material channel; and the upper end of the launching cavity is connected with the material putting chamber through the first material channel, a first electromagnet opposite to a first permanent magnetin magnetic pole is arranged at the tail end of a piston rod, and a second electromagnet is arranged on the inner wall of the upper end of the second material channel. The spontaneous-combustion typefire extinguishing bullet and the launching device thereof are high in safety factor and convenient to carry and are not limited by the geographical location and water sources, a large quantity of human resources can be saved, and ash is prevented from combusting again under the condition that the normal atmosphere is restored.

The invention discloses a method adopting static passwords as a source to generate dynamic passwords. The method comprises the following steps that: S1, a server end stores static passwords and index codes; S2, the server end randomly generates an intermediate password mapping relation set when the server end receives a password input request from a user end every time, wherein the index codes are used for designating one piece of relation of the intermediate password mapping relation set as intermediate passwords which is used by current password inputting, and the server end generates dynamic passwords according to a dynamic password mapping relation between the intermediate passwords and an input keyboard; S3, the server end displays the intermediate password mapping relation set on an operation interface of the user end so as to prompt the user to use the index codes to find middle passwords and to obtain dynamic passwords through using the dynamic password mapping relation between the intermediate passwords and the input keyboard; and S4, the user end transmits the dynamic passwords inputted by the user to the server end, and the server end verifies whether the dynamic passwords inputted by the user are consistent with the dynamic passwords generated in the S2. The method adopting the static passwords as the source to generate the dynamic passwords of the invention can improve the protection for the static passwords.

The invention discloses an anti-collision protection device for a charging pile of a new energy automobile, and relates to the technical field of new energy, in particular to the anti-collision protection device for the charging pile of the new energy automobile. The device comprises a parking space ground, a mounting plate, the charging pile of the new energy automobile and a fixed plate. According to the anti-collision protection device for the charging pile of the new energy automobile, through cooperative use of a rubber pad, a built-in blocking cylinder, an external annular blocking cylinder and a shock-proof spring, the built-in blocking cylinder is used for comprehensively protecting the charging pile of the new energy automobile; when a driver operates improperly, some vehicles runfrom the side surface of the ground of the parking space or crash the rear metal baffle plate, and the vehicle is buffered for the first time through a rubber pad; meanwhile, a shock absorption spring deforms, the impact force is reduced again, and finally, the vehicle is blocked through a built-in blocking cylinder, so that the new energy vehicle charging pile is effectively prevented from beingdamaged, and multi-layer protection is formed for the new energy vehicle charging pile; therefore, the working efficiency of the charging pile anti-collision protection device of the new energy automobile is improved.

The invention discloses an emergency cut-off device. The device comprises a protective bottom shell and a protective upper cover, a circuit breaker is arranged between the protective bottom shell andthe protective upper cover; the circuit breaker comprises two insulating stand columns installed on the protective bottom shell, the upper ends of the insulating stand columns are provided with powerconnection contacts connected with two transmission lines, a conductive plate is arranged between the two power connection contacts, and the protective bottom shell and the protective upper cover areprovided with a circuit cut-off reset mechanism used for circularly achieving circuit cut-off and circuit connection; the protection bottom shell and the protection upper cover are each provided witha heat dissipation assembly, the heat dissipation assemblies achieve sealing under the effect that the circuit cut-off reset mechanism lifts the conductive plate to be powered off, and the heat dissipation assemblies achieve heat dissipation and cooling under the effect that the circuit cut-off reset mechanism pushes the current plate to be powered on. According to the scheme, power-off electric arcs are prevented from being generated when a transmission circuit is cut off, the service life of the emergency cut-off device is prolonged, cooling and heat dissipation are achieved through multipleformed heat dissipation openings, and meanwhile the heat dissipation openings are completely sealed to achieve self-protection.

The invention discloses a multi-functional headset intelligent fire fighting system and a control method thereof. According to the multi-functional headset intelligent fire fighting system, a vibration-resistant platform is adopted to eliminate high-frequency vibration in the movement process of a fireman, an ultrasonic sensor makes up for the deficiencies of an infrared camera on deep information perception, and three-dimensional physical environment and temperature field distribution in a fire scene environment are calculated through a fusion algorithm; meanwhile, a combined sensor of GPS and inertial measurement and a magnetic field sensor are adopted, inertial movement information, magnetic field information and position speed information are fused, and information, such as a position, a speed, a posture and the like, relative to a node can be accurately acquired, so that a position and a direction of the node in a whole fire scene is assisted to be accurately established, and the three-dimensional physical environment and the temperature field distribution in the whole fire scene environment is established accurately by integrating various nodes; and in addition, by combining with historical data, optimal action strategy is obtained. The multi-functional headset intelligent fire fighting system accurately perceives the fire scene environment, rapidly analyzes a form of a fire and can perform intelligent decision, and thus own protection and efficient rescue and fire-fighting of the fireman is realized.

The invention discloses a dynamic sail wind energy machine which comprises a main shaft, a bootable disk, a rotating bracket and sail components, wherein the rotating bracket can revolve around the main shaft, the sail components can rotate on the rotating bracket, and the rotation direction is opposite to the revolution direction; a guiding track arranged on the bootable disk is matched with thesail components and controls the sail components to rotate on the preset track, and the rotation is non-uniform rotation; within a period of revolution of the sail components, according to the different included angles formed by the sail of the sail components and the wind direction, a downwind maximum resistant state region which corresponds to the first revolution angle is formed, the sail and the wind direction can be vertically orthogonal within the downwind maximum resistant state region. According to the invention, the working efficiency of the sail can be effectively improved.

The invention discloses an automatic temperature control system and method for a sample heat treatment process under ultrahigh vacuum, and belongs to the field of temperature control. The system comprises an optics thermodetector, a vacuum gauge, a computer and a current source, the optics thermodetector and the vacuum gauge are located in ultrahigh vacuum sampling heating equipment, an infrared thermodetector and the vacuum gauge are connected with the computer, the computer is connected with the current source, and the current source is connected with a sample. Temperature negative feedbackto current of the heated sample is utilized, thereby achieving simple, quick and accurate temperature control, an RS232 serial port is used for connecting various instruments, a temperature differencevalue between a sample temperature measured by the optics thermodetector and a preset sample temperature is calculated, and a PID algorithm is used for feeding back and setting the applied current onthe sample by the current source. Although different types of current is required for heating samples due to sizes, manufacture and the like, the system can accurately control the sample temperatureto a set temperature within 1 DEG C in half a minute.

A push button protecting structure for cleaner is composed of a front cover to form a dust collecting box, the bush buttons arranged between front cover and back cover for covering on the contacts of power switch and power cord winder and with an operation limiting notch at the middle of its front wall, and a curved arm able to be inserted in said limiting notch. Its advantages are short stroke, the ability to lock the push button, and beautiful appearance.

The invention discloses a servo online oil sampling and controlling device and a method. The servo online oil sampling and controlling device comprises a water pump, a direct current power supply interface, a power supply conversion unit as well as a CAN (Controller Area Network) communication unit, an ARM (Advanced Reduced Instruction Set Computer Machine) chip, an information acquisition and feedback unit, a control driving unit and a solenoid valve which are respectively connected with the power supply conversion unit, wherein the ARM chip is used for realizing the dual closed-loop control for the sampling amount and the flow speed of a sample by the control driving unit; and during detection, the solenoid valve is opened and oil enters the device under the action of the water pump. The method is realized in such a way that when the water pump works, the information acquisition and feedback unit is used for acquiring an rotating angle and speed of a water pump impeller in real time and transmitting the rotating angle and speed to the ARM chip; and the ARM chip is used for calculating a fed signal valve and then comparing the calculated signal valve with expected values of the given sampling amount and the flow speed of the sample and further adjusting the operation state of the water pump according to the difference between the calculated signal valve and the expected values. The servo online oil sampling and controlling device and the method disclosed by the invention have the advantages of simple structure, high calculation speed, high communication efficiency, convenience in expansion and self-protecting function of current closed loop.

The invention discloses a method for enhancing the in-orbit reliability of a moonlet, relates to the field of the in-orbit reliability guaranteeing of a spacecraft, and solves the problems of poor reliability, low working efficiency and the like since the moonlet is likely to be subjected to a situation that one-machine component is out of control or a whole spacecraft is out of control when the moonlet carries out in-orbit task execution. Interruption is used for solving the problem of the abnormal communication of the moonlet, software on satellite is used for automatically solving the problem that an RS422 bus, a CAN bus and a PPS (Pulse Per Second) signal are continuously abnormal. When certain one machine is subjected to abnormal communication, after interruption frequencies achieve apreset threshold value, the communication interface of the one machine is shielded through a continuous interruption way, and the one-machine component is restarted. Since an abnormity processing method is carried out in application software, an effect of quick response and abnormal processing can be achieved. The problem that the abnormity is only solved through the injection of a remote controlinstruction on the ground after the satellite rises to the sky, and the reliability and the stability of the in-orbit operation of the moonlet are effectively improved.

The invention discloses a three-phase brushless direct current motor control system based on a CAN (controller area network) bus and an ARM (advanced reduced instruction set computer machine). The system is used for monitoring a running condition of a motor in real time, and comprises a power supply module, a control module, a driver module, a protection module, a sensing module, a CAN communication module and an upper computer, wherein an ARM chip is in signal connection with the upper computer by the CAN communication module; the upper computer sends an instruction to allow the ARM chip to generate a PWM (Pulse-width Modulation) wave to control the rotating speed of the motor; stepless speed regulation of the motor can be achieved by changing a duty ratio of the PWM wave; an incremental photoelectric rotary encoder converts a rotating angle and the rotating speed of the motor into a pulse signal, and feeds back the pulse signal to a quadrature encoding pulse unit of the ARM chip; the ARM chip collects the fed back pulse signal and compares with given expected values of a position and the speed, to achieve double closed-loop control of the position and the rotating speed; and a locked rotor current of the motor is acquired by the motor driver module, converted into a voltage signal, and fed back to the motor driver module by a voltage comparator, so that overcurrent protection is achieved. The system has the advantages of simple structure, high operating speed, high communication efficiency, and the like.

The invention discloses a measurement system for a quality mass center of an instrument panel assembly and a measurement method. The measurement system for the quality mass center of the instrument panel assembly consists of a measurement device and a data collection control assembly. The measurement device is constituted by measurement units. The measurement unit consists of an instrument panel support mechanism, an elevating mechanism and a bottom support mechanism. A sliding block on the top of the support mechanism can perform two-direction sliding with two free degrees. The elevating mechanism can be vertically adjusted. The bottom support mechanism can perform two-direction sliding. An instrument panel to be measured is installed on the instrument support mechanism, the elevating mechanism and the bottom support mechanism are adjusted, measurement and collection are performed through the data collection control assembly, and the mass center of the instrument panel is obtained bycalculation. The measurement method adopts four point method, and can realize one time clamping to realize measurement on quality and mass center of the instrument panel to be measured. The measurement system and measurement method not only realize measurement on three-dimensional instrument, but realize real-time monitoring and calculate a verification testing result and an effective measurementaccuracy.

The invention discloses a fire extinguishing bomb. The bomb comprises a first container, a second container and a fixing base, wherein the outer wall of the fixing base is in threaded connection withthe inner wall of the first container, moreover, the second container is sleeved with the first container, and a third container is further sleeved with the second container; a plurality of round holes are formed in the surface of the third container, and puncture bulges are arranged at the gaps of the round holes; the invention further provides a launching device, the launching device comprises alaunching cavity, a material feeding chamber, a first spring, a first material passage and a second material passage, wherein the upper end of the launching cavity is connected with the material feeding chamber through the first material passage, an air pressure cylinder is arranged on the inner wall of the right end of the launching cavity, moreover, the tail end of the air pressure cylinder isconnected with one end of the first spring, and the other end of the first spring is provided with a first permanent magnet; and a first electromagnet which is opposite to the magnetic pole of an permanent magnet is arranged at the tail end of a piston rod, a second electromagnet is arranged on the inner wall of the upper end of the second material channel, and the second electromagnet is connected with the permanent magnet through a second spring. According to the bomb and the device, the structure is simple, operation is convenient, and application range is wide.

The invention discloses an automatic folding type charging pile, and belongs to the field of charging piles. The automatic folding type charging pile comprises a base and a charging pile body, a coverplate is fixed to the top of a rear plate through a hinge and a torsion spring, and the torsion spring pushes the cover plate to automatically cover the top of the base; the lower portion of the charging pile body is installed on a rotating shaft between a left plate and a right plate through bearings, and the two ends of the rotating shaft are fixed to the upper portion of the left plate and theupper portion of the right plate separately; a fixed gear wheel is arranged on the portion, located on one side of the charging pile body, of the rotating shaft, a motor is arranged in the charging pile body, an output shaft of the motor penetrates through the charging pile body, the end of the output shaft is provided with a driving gear wheel, and the driving gear wheel is meshed with the fixedgear wheel; and a time relay is arranged in the charging pile body, and the time relay is connected with a controller of the motor. The automatic folding type charging pile can not only be arranged directly in the open air, but also can be automatically folded, the situation that the charging pile is damaged after being caught in the rain due to the fact that a user forgets to or deliberately does not fold the charging pile manually is prevented, and the service life of the charging pile is prolonged.

The invention discloses a water quality on-line monitor for river regulation. The water quality on-line monitor comprises a monitoring box used for installing all assemblies, a top cover is arranged at an opening in the top of the monitoring box, a controller is arranged on the lower surface of the top cover, the controller is connected with an electric power storage assembly, a sampler, a monitor and a driver through wires, a cleaning device is arranged in the monitoring box, a set of floating device is arranged on the bottom surface of the monitoring box, a set of dredging device is arranged on the outer wall of the monitoring box, and a set of driver is arranged at the tail of the monitoring box, water taking operation can be well carried out through the sampler, meanwhile, the whole device is well self-protected, the service life of the whole device is prolonged, and the sampling process is controlled. Accurate monitoring operation of water quality is facilitated. The monitoring precision of the sensor group is ensured through the monitor, the corrosion of the sensor group caused by the fact that a water sample is attached to the sensor group for a long time is prevented, and the service life of the equipment is prolonged.

The invention discloses a multi-well wellhead dosing device with a backflow self-protection multichannel solenoid valve terminal, and belongs to the field of wellhead dosing for cluster well groups in oil fields. The device at least comprises a dosing box, a control cabinet, the multichannel solenoid valve terminal, a high-pressure metering dosing pump, a pressure gauge, related pipelines and related control circuits; the multichannel solenoid valve terminal at least comprises a distribution valve terminal base, high pressure solenoid ball valves, a liquid return port and a liquid inlet; the liquid inlet and the liquid return port are integrated on one distribution valve terminal base; a plurality of high pressure solenoid ball valves are arranged symmetrically by taking a perpendicular center line of the distribution valve terminal base as an axis. Through the multichannel solenoid valve terminal with a pressure adjusting protective valve, the multi-well wellhead dosing device has a pressure protection function. When the pressure of a certain well is abnormal, the pressure adjusting protective valve can be automatically opened to form a circulation loop, an agent is prevented from flowing back into the solenoid valves and the dosing pump, and remote auto-control wellheads of the cluster well groups in the oil fields work safely without fault in the dosing process.

The invention relates to the technical field of industrial control, in particular to a switching value output self-protection circuit. The switching value output self-protection circuit achieves the technical purpose that a system is maintained conveniently. The circuit comprises an output relay, a Hall current sensor, an and gate and an output drive module for driving the output relay to be switched on and switched off. The drive signal output end of the output drive module is connected to the control end of the output replay. The primary side output end of the Hall current sensor is connected to a static contact of the output relay. One input end of the and gate is connected to a secondary-side voltage output end of the Hall current sensor, the other input end is connected to a switching value signal source, and the output end of the and gate is connected to the source signal input end of the output drive module. The circuit is especially suitable for the switching value output module of a digital control platform based on an FPGA technology.